Creating a will is one of the most important steps you can take to protect your loved ones and ensure your wishes are honoured after you’re gone. But even with the best intentions, small errors can have serious consequences. In fact, a will that isn’t properly prepared or executed can be declared invalid – leaving your estate in legal limbo and causing undue stress for your family. To help you avoid the pitfalls, here are some of the most common mistakes that can invalidate a will in Australia.

Failing to Sign the Will Correctly

One of the most basic, yet critical, mistakes is not signing the will correctly. Under Australian law, your will must be signed by you, in the presence of two witnesses who are present at the same time. If this requirement isn’t met, the will could be considered invalid. Also, the witnesses must not be beneficiaries of the will, as this can raise questions about undue influence or conflict of interest and may disqualify them from receiving their inheritance.

Using an Outdated Will

Many people forget to update their will when major life events occur—such as marriage, divorce, the birth of a child, or the death of a beneficiary. In some states, marriage can automatically revoke a will, unless the will was made in contemplation of that marriage. An outdated will can lead to confusion, disputes, or unintended outcomes. It’s important to regularly review and update your will to ensure it reflects your current wishes and circumstances.

Not Revoking Previous Wills

When creating a new will, it’s essential to explicitly revoke any previous wills or codicils (formal amendments). If this isn’t done clearly, multiple versions of your will may exist, leading to disputes and delays in administering your estate.

Poorly Drafted Provisions

Ambiguous or vague language can be a major issue in wills. If your intentions aren’t clearly expressed, the court may have to interpret your meaning, which could result in outcomes you didn’t intend. This is especially common with DIY wills or templates downloaded from the internet. While they might seem convenient, they often lack the legal precision needed to avoid complications.

Lack of Testamentary Capacity

For a will to be valid, the person making it must have testamentary capacity. This means you must understand the nature and effect of the will, what assets you own, and who might reasonably expect to benefit from your estate. If there is any doubt about your mental capacity at the time the will was made—particularly if there’s a history of illness or cognitive decline—your will may be challenged.

Undue Influence or Pressure

If someone has pressured or manipulated you into making or changing a will, it could be deemed invalid due to undue influence. This is particularly concerning for vulnerable individuals or those in isolated situations. To protect against such claims, it’s advisable to seek independent legal advice and avoid having beneficiaries present when discussing or signing your will.

Improper Storage or Loss of the Original Will

Even a perfectly drafted will can be rendered useless if the original document is lost or damaged. Courts generally require the original version of the will to be submitted during probate. If only a copy is available, it may be difficult to prove its validity. Store your will in a safe place—such as with your solicitor, in a secure safe, or with a wills registry—and ensure your executor knows where to find it.

Avoid the Risks—Get Expert Guidance

Given the potential for costly and emotionally taxing mistakes, it’s wise to engage experienced professionals when drafting or updating your will. Trusted solicitors for wills can help ensure your document is legally valid, clearly worded, and aligned with your current wishes. By avoiding these common pitfalls, you’ll gain peace of mind knowing that your estate will be handled smoothly—and that your legacy will be protected for the people who matter most.